collins



Oct. 30, 1928. 1,689,862

a. A. COLLINS REROLL DEYICE Filed Aug. 23, 1925 WITNESSES 2 R iNVENTOR 5. 4 690/924 60/005.

, A oRNEY Patented Uct. Eidliiilti.

" UNITED STATES I eeann PATENT OFFICE.

GEORGE A. COLLINS, F FRESNO, Clllilillfilhll'lix, ASSIGNOR TO WTEZEVJQINGHOU'SE ELECTRIC & MANUFACTURING CGMPAN'TE, A CUREPORATIUN OF PENNSYLVANIA.

Rll-ERUEJL DEVICE.

Application filed. August 23, 1926. Serial No. 131,091.

7 My invention relates to re-roll devices and paraicularly to devices tor re-rolling the chartsor record sheets oi recording instruments. I

One object of my invention is to provide a device of the above-indicated character that shall permit positive interlocking relation between the driving and the driven elements in order that the elements may move in unison and that shall also permit the elements to move relatively;

iinothcrobject of my invention to pro-- vide a re-roll device especially adapted for a graphic meter that shall maintain the chart or record sheet under substantially constant tension.

A further object of my invention is to provide a graphic meter re-rolldevice that shall be simple and durable in construction, economical to manufacture and cil'ective in its operation.

In a graphic meter or similar dcvice,the flexible record sheet or tape is fed from a supply roller to a take-up roller, and it is desirable tohave the flexible element so fed as to maintain it under substantially constant tension. Otherwise, it likely to buckle and pile up to destroy the record, to become entangled with the instrument mechanism and to cause trouble, delays and loss in other ways.

Various suggestions have been made to overcome the aboveanentioned objections such asfriction clutches, tension belts and other devices, which have been more or less complicated and expensive.

It is my aim to overcome the above-mentioned objections in a simple, economical way and to provide graphic meter that shall op crate effectively over long periods of time without attention.

Accordingly, in practicing my invention, I provide driving and driven elements, one of which so alternately engages and releases the other as to positively drive the cha rt during one definite period or cycle of operation and to permit adjustment oi the same during the remainder oi? said period.

Figure 1 of th accompanying drawing is a fragmentary side elevational view 01 a graphic measurin instrument embodying my invention,

Fig. 2 is a fragmentary :iront clevat-ional view of the strument shown in Fig. 1, and

i Fig. 3 's an enlarged detail view, partially in elevation and partially in section, of a portion or the instrument shown in the other iigures.

The device comprises, in generaha frame work or bracket structure 1 on which are mounted a supply roller 2, a take-up roller 3 and a drive roller l. i

A sheet or recording paper 6 extends from the supplyroller 2, over an idler roller 7, to the drive roller a from whence it extends, over idler rollers 8 and 9, to the take-up roller 3. A portion 10 or the chart 6, between the idler roller 5) and the take-up roller 3, is adapted for co-operation with a pen or stylus (not shown) and is the portion which is particularly desirable to maintain under con stant tension.

The drive roller l is mounted on a shaft 11 and is adapted to be driven at a constantspeed by any suitable device such as a clockwork mechanism (not shown).

A pulley 12 mounted on the shaft 11 is connected by a belt 14L to a pulley 15 that is mounted on a shaft 16 on which the take-up roller 3 is also mounted.

'lhepulley 16 ispreferably of smaller diameter than the pulley 12 so that there is a constant tendency to increase the speed of the take-up roller 3 to maintain the portion 1O 01 the chart under tension.

The flexible element or belt 14 is constructed of yielding material, such as woven fiber or metal threads, in order that it may be readily pierced by a relative sharp pin or projection 1'? on the perimeter orbearing surface of the pulley 12. The pulley 15 is preferahly provided with a roughened or other surface to prevent slippage between the belt ll and the pulley 15, whereas the surt'acc oi? the pulley 12 is smooth to permit slippage 9 between the belt 1 and the pulley 12 when the pin 17 is not in engagement with the belt.

In ope 'ation, with the drive roller 1. rotating in the clockwise direction as viewed in Fig. 1, the pin 1? pierces or indents the belt 1 1 to be positively interlocked therewith during somewhat more than one-halt ot a revolution of the pulley 12. During this period, since the belt does not slip with respect to the take-up pulley 15, the parts are positively related, thus tending, by reason of the different diameters of the pulleys, to exert a tension on the chart 6.

However, during the time that the pin 17 is out of engagementwith the belt 1 1, the belt are ticular form of my invention, changes may beefi'eote'cl tlieiein without departing from the spirit time scope thereof as set t-orth in the appended claims.

Cilwl ll'l' as my invention:

l. inane- 1 011 tlev'i'c'e, the eomb'inat'ion with chive and "take wp rollers,- of means for driving the take-up roller eo m'prising filriv-ing' el'e'n- ""t' s having lposit ive interlocking relation c'l n g-a portionolf the elri i-ngeyele and a 'eli-p relation -cli1ring another portion 0T the cycle. i

, Q. in a re-rol ltlevice, the combination with cl-rive and take-1 1p rollers, of means *con'neot- "i'e Tol lersto'have positive inteiloeliing tion tlaning apertien of the driving; cycle and slip -i*elat'i-o-n el ua'ing another ipor'tion of the cycle. k 3. l n a'r'e rollcleviee,theeonibination with th ive minimize-u rollers, of means-tor (1-iiv'- take-up roller comprisingdrivingelements having positiveil rl'o'cliin-g *relift'ion duringa portione f thee-r ng operation and ztritien 'slip l'elation during another portion of said up erifition.

4. The combination 'with pair of pulleys and belteoniie'oti' D the same, of means Etor alternately 'p'osit-"vely interioektng 'sai cl tel-t to one of Said pulleys to move therewith and permitting movement of the belt relati'i' e thereto. I V

5. The-combination with a panel pnll'eys amt a belt eonneeti-ng the same, of means for positively interlocking the belt tonne of e aitl pan-eye "to move therewith 'itfl'tl "permitting movement of the belt ielative thereto, Compsing means on said one pulley "for alternately engaging and disengagin the belt,

6. The eon'ibii'iation \vi'th a rotatable element a ncl a belt Co-op'etating therewith o f means *for positively interlocking s'a-icl eleelements for alternate indenting engagement and disengagement with the other.

8. The combination with a rotatable element and 'a flexible element co-operating terewith, said flexible element being contiudted of ielding material, of nleai'is tor alternately posi'tive ly interloelring said ele- =nie1 l tsto' 1n'ove in unison and pernlittin'g relative movement of the elements, con :1) ri sing a relatively sharp-pointed eproj eeti on on the retatable element for ilrtleifting saitl yielding element. 7

l). The eoi-nbination with a rotatable elemen-t and a flexible eleinent 'co-operati11g therewith, said flexible element being eon- Strudtecl of woven i'n'ateri'a'l, of mon hs :lior alternately positively interloehing sail ole ments to move in 'llYllSO'I] and permitting relative movement of the elements, eon'lpil'ieiirg a relatively sharp-pointed proj eetioiron tho-1etatable element for engaging" said wmn elemenu,

10. In a re-roll device, the eo'xnl)inatimi with 'clrive antl take-n1) rollers an?! a mlley mounted to rotate withea'eh t l'1ereol,ota belt etengageable material connecting the pu lleys and a relatively sharp-fpon'ited projection on the "chive pulley l oi' engagin aml ioi-"tivel\ driving the belt flarin a portion of ea tli revolution of the drive pulley and for releaw i-n'g the belt to permit relative eli between the =clrive pulley and the belt during the remainclero't each revolution of the (hive puly- In testimony wl'rereot, I have lll'fllllllfiSullseribecl my nameillis tenth day o l August, 1 926.

(ill 

